Create an informative issue (See each section, incomplete templates/issues won't be triaged)

Using the current documentation as a model, please complete the issue template.

Note: Doc team updates the current version and the two previous versions (n-2). For earlier versions, we will address only high-priority, customer-reported issues for releases in support.

Prerequisite: Start with what we have

Always look at the current documentation to describe the change that is needed. Use the source or portal link for Step 3:

• Use the Customer Portal: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.6

• Use the GitHub link to find the staged docs in the repository: https://github.com/stolostron/rhacm-docs

  Describe the changes in the doc and link to your dev story

Provide info for the following steps:

1. - [x] Mandatory Choose the documentation release (Published releases are refreshed ~weekly after publication).

• [ ] ACM 2.5
• [ ] ACM 2.6
• [ ] ACM 2.7
• [x]ACM 2.8 (upcoming release)

• [ ] MCE 2.1
• [ ] MCE 2.2
• [ ] MCE 2.3 (upcoming release)

2. - [x] Mandatory Choose the type of documentation change.

• [ ] New topic in an existing section or new section
• [x] Update to an existing topic

3. - [ ] Mandatory for bugs: What is the diff? Clearly define what the problem is, what the change is, and link to the current documentation:

4. - [x] Mandatory for GA content:

• [ ] Add steps and/or other important conceptual information here:

• [x] Add the Required access level for the user to complete the task here: Access to the `open-cluster-management-observability` namespace and ACM Grafana.

• [x] Add verification at the end of the task, how does the user verify success (a command to run or a result to see?)
  • When the user upgrades to ACM 2.8, they are able to verify the Grafana version by accessing the `observabilty-grafana` pod in the `open-cluster-management-observability` namespace. From the pod's terminal, the user can enter the following command: `grafana-cli`, which will display the Grafana version that is currently deployed within the cluster environment.
  • Another way to verify the Grafana version is to navigate to the ACM Grafana dashboard, select the `Manage` tab and scroll down to the bottom of the page. Within the page's footer, the version of the Grafana instance will be displayed.

• [x] Add a link to dev story here: https://issues.redhat.com/browse/ACM-1783

• Errata release note version, this is NOT for regular refreshes:
  (published with Errata release)

• [ ] ACM 2.4.x
• [ ] ACM 2.5.x
• [ ] ACM 2.6.x
• [ ] ACM 2.7.x

• [ ] MCE 2.0.x
• [ ] MCE 2.1.x
• [ ] MCE 2.2.x

ACM 2.8's Grafana component version has been upgraded from v8.1.3 to v8.5.20.